Can machines think? That's what renowned mathematician Alan Turing sought to understand back in the 1950s when he created an imitation game to find out if a human interrogator could tell a human from a machine based solely on conversation deprived of physical cues. The Turing test was introduced to determine a machine's ability to show intelligent behavior that is equivalent to or even indistinguishable from that of a human. Turing mainly cared about whether machines could match up to humans' intellectual capacities.
But there is more to being human than intellectual prowess, so researchers from the Center for Complex Systems and Brain Sciences (CCSBS) in the Charles E. Schmidt College of Science at Florida Atlantic University set out to answer the question: "How does it 'feel' to interact behaviorally with a machine?"
They created the equivalent of an "emotional" Turing test, and developed a virtual partner that is able to elicit emotional responses from its human partner while the pair engages in behavioral coordination in real-time.
Results of the study, titled "Enhanced Emotional Responses during Social Coordination with a Virtual Partner," are recently published in the International Journal of Psychophysiology. The researchers designed the virtual partner so that its behavior is governed by mathematical models of human-to-human interactions in a way that enables humans to interact with the mathematical description of their social selves.
"Our study shows that humans exhibited greater emotional arousal when they thought the virtual partner was a human and not a machine, even though in all cases, it was a machine that they were interacting with," said Mengsen Zhang, lead author and a Ph.D. student in FAU's CCSBS. "Maybe we can think of intelligence in terms of coordinated motion within and between brains."
The virtual partner is a key part of a paradigm developed at FAU called the Human Dynamic Clamp -- a state-of-the-art human machine interface technology that allows humans to interact with a computational model that behaves very much like humans themselves. In simple experiments, the model -- on receiving input from human movement -- drives an image of a moving hand which is displayed on a video screen. To complete the reciprocal coupling, the subject sees and coordinates with the moving image as if it were a real person observed through a video circuit. This social "surrogate" can be precisely tuned and controlled -- both by the experimenter and by the input from the human subject.
"The behaviors that gave rise to that distinctive emotional arousal were simple finger movements, not events like facial expressions for example, known to convey emotion," said Emmanuelle Tognoli, Ph.D., co-author and associate research professor in FAU's CCSBS. "So the findings are rather startling at first."
Earlier this year, 100 million people watched a Google-owned computer beat a (human) champion at Go, the world’s most complicated board game. So how did the machine triumph, and what are the implications for the struggle between man and machine?
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The microscopic world is governed by the rules of quantum mechanics, where the properties of a particle can be completely undetermined and yet strongly correlated with those of other particles. Physicists from the University of Basel have observed these so-called Bell correlations for the first time between hundreds of atoms. Their findings are published in the scientific journal Science.
Everyday objects possess properties independently of each other and regardless of whether we observe them or not. Einstein famously asked whether the moon still exists if no one is there to look at it; we answer with a resounding yes. This apparent certainty does not exist in the realm of small particles. The location, speed or magnetic moment of an atom can be entirely indeterminate and yet still depend greatly on the measurements of other distant atoms.
With the (false) assumption that atoms possess their properties independently of measurements and independently of each other, a so-called Bell inequality can be derived. If it is violated by the results of an experiment, it follows that the properties of the atoms must be interdependent. This is described as Bell correlations between atoms, which also imply that each atom takes on its properties only at the moment of the measurement. Before the measurement, these properties are not only unknown -- they do not even exist.
A team of researchers led by professors Nicolas Sangouard and Philipp Treutlein from the University of Basel, along with colleagues from Singapore, have now observed these Bell correlations for the first time in a relatively large system, specifically among 480 atoms in a Bose-Einstein condensate. Earlier experiments showed Bell correlations with a maximum of four light particles or 14 atoms. The results mean that these peculiar quantum effects may also play a role in larger systems.
In order to observe Bell correlations in systems consisting of many particles, the researchers first had to develop a new method that does not require measuring each particle individually – which would require a level of control beyond what is currently possible. The team succeeded in this task with the help of a Bell inequality that was only recently discovered. The Basel researchers tested their method in the lab with small clouds of ultracold atoms cooled with laser light down to a few billionths of a degree above absolute zero. The atoms in the cloud constantly collide, causing their magnetic moments to become slowly entangled. When this entanglement reaches a certain magnitude, Bell correlations can be detected. Author Roman Schmied explains: “One would expect that random collisions simply cause disorder. Instead, the quantum-mechanical properties become entangled so strongly that they violate classical statistics.”
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When takes to the stage in Germany on Sunday for his first appearance at Hannover Messe, one of the main events in the manufacturing industry’s annual calendar, it will signal a significant change for Microsoft. The chief executive of the technology
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